OMG!

[Hilldodger]

Where do they go?

Duh! Australia!

 

[Arch]

Duh! Australia!

Wow, so somewhere in Oz, there's a huge hole with water gushing out? Cool...............!

 

[mcshroom]

I think these can be pretty scary holes as well

 

[buggi]

I'd happily explore one of those sink holes when the thing was dry!

I remember when I used to do a lot of canoeing, big weirs used to terrify me - they are designed so that the water running over them plunges down to a depth of 10 feet or more to clean the water (so I was told!) and if you get sucked in, your body will go round and round down there for hours before being spat out at the side.

There's a trick to getting out of a weir. i think you have to swim down to the bottom and then along the bottom. otherwise, if you try to swim up then, yes, you just get turned round and round. I'm pretty sure that's how you get out anyhow, but i'm sure someone will correct me if i'm wrong.

That's the 2nd sink hole to open up in Guatamala apparently. and those drain things give me the heebyjeebies as well.

 

[buggi]

Wow, so somewhere in Oz, there's a huge hole with water gushing out? Cool...............!

It that what a geyser is then???

 

[buggi]

Here are some pics taken by somebody who abbed into a bell mouth spillway:http://tastelessphot...ay-exploration/

wow i'd love to do that.

 

[Rhythm Thief]

It's the sudden 'sink' holes that open up that are scary.......

There was one in Didsbury Centre a couple of years ago - opened up just after a bus went over it..... there is video on the web.

One local house had a big crater open up on their driveway - caused by a 'stream' which no-one knew was there.........

Black Harry Tunnel.

 

[Headgardener]

^ Interesting site RT just added it to my favourites list.

 

[Globalti]

Oh yes! Hours of work time reading potential there, thanks!